Table 3.

Selectivity Index (SI) of Ipomoeassin F, Its Analogue 3, and Paclitaxel over MCF-10A Cells^a

	MDA-MB-231	MCF7	HeLa	U937	Jurkat
ipomoeassin F	0.83	0.12	0.33	1	0.89
3	1.91	0.93	2.06	2.77	3.16
paclitaxel	8.04	3.73	25.6	15.2	14.6

^aThe data were obtained from at least two independent experiments, and the standard errors are within 20%.